# Mental Arithmetic, Basic and General Mathematics Practice Questions Test

Solution!
1.99 * 3 = $5.97. #### Question No 52 If the product of 4 consecutive integers is 120, which is greater? #### Select the correct answer Solution! 5*4*3*2 = 120. #### Question No 53 Multiply 72 by 15. #### Select the correct answer Solution! 72 * 15 = 1080! !Other way is! !72 * 10 = 720!and!720 / 2 = 360! !720 + 360 = 1080. #### Question No 54 35 Kg of spinach costs Rs. 28. How many Kg of spinach can be bought for Rs. 16? #### Select the correct answer Solution! Amount of spinach which can be bought in Rs. 28 = 35 kg! !Amount of spinach which can be bought in Rs. 1 = 35/28 = 5/4 Kg! !Amount of spinach which can be bought in Rs. 16 =(5/4)*16 = 20 Kg. #### Question No 55 What is 5/9 of 270? #### Select the correct answer Solution! (5/9) * 270 = 150. #### Question No 56 The average of five numbers is 27.If one number is excluded the average becomes 25.What is the excluded number? #### Select the correct answer Solution! No answer description available for this question.. #### Question No 57 If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, what is the average marks of all the students? #### Select the correct answer Solution! Weighted average will be more close to the average of that batch which has maximum number of students so aanswer is 54.68! !If you want to calculate it by formula then solution is! !(55*50 + 60*55 + 45*60)/(55 + 60 + 45) = 54.68. #### Question No 58 How much is 25% of$200?

Solution!
25 * (200/100) = $50! !Or!200 / 4 =$50.

#### Question No 59

John can read 8 pages of a book in 7 minutes, how long will he take to read 40 pages?

Solution!
40/8 = 5! !As pages are increased 5 times. So minutes will also increase 5 time.! !7 * 5 = 35.

#### Question No 60

Average of 4 numbers is 24. What is the sum of the four numbers?

Solution!
x/4 = 24!x = 24*4!x = 96.

#### Question No 61

Multiply 15 by 6 and subtract 29.

Solution!
15 * 6 = 90! !90 - 29 = 61.

#### Question No 62

Add 2/5 of 90 to 5/6 of 78.

Solution!
(2/5) * 90 = 36! !(5/6) * 78 = 65! !36 + 65 = 101.

#### Question No 63

Which is greater, (A) 5/8 of 112 , (B) 7/8 of 88?

Solution!
(5/8) * 112 = 70! !and!(7/8) * 88 = 77! !Hence, (7/8) of 88 is greater..

#### Question No 64

If the number 5r2 is divisible by 6, then r = ?

Solution!
572 is completely divisible by 6..

#### Question No 65

Multiply 6.85 by 7.

Solution!
6.85 * 7 = 47.95.

#### Question No 66

At a particular time shadow of a pole 40m long is measured to be 30m. If the length of a plaza is 200m then how long would the shadow be at about the same time?

Solution!
Shadow of 40m pole = 30m! !Shadow of 1m pole = 30/40m! !Shadow of 200m plaza = (30/40)*200 = 150m.

#### Question No 67

What is 126 divided by 3?

Solution!
126 / 3 = 42.

#### Question No 68

What is 3206 divided by 7?

Solution!
3206 / 7 = 458! !No need to perform complete devision first digit comes 4 after devision and there is only one option in which first digit is 4..

#### Question No 69

What is 5/8 of 240?

Solution!
(5/8) * 240 = 150.

#### Question No 70

If n is even, Which of the following cannot be odd? (1) n+3 (2) 3n (3) n^2 - 1

Solution!
3n and n^2 - 1 will always odd so in case of 3n answers will be even..

#### Question No 71

16 men dig a ditch in 10 days. How many men would be required to complete the job in half the time?

Solution!
Double number of men are required to complete the job in half time..

#### Question No 72

Price of a mobile phone is Rs. 8,000. A man has enough money to purchase 3 mobiles. How many mobile can he purchase if the price is reduced by Rs. 2000?

Solution!
Minimum amount of money that he has = 8,000 * 3 = 24,000! !If price is reduced to 6,000, he can purchase 24,000/6,000 = 4.

#### Question No 73

Multiply 7 by 4 by 6.

Solution!
7 * 4 = 28! !28 * 6 = 168.

#### Question No 74

Which of the following is an integer that has a remainder of 1 when it is divided by 4,5 and 6?

Solution!
Least common multiple of 4,5 and 6 is 60 so 61 is an integer that has a remainder of 1 when it is divided by 4,5 and 6..

378 * ? = 252

Solution!
252 / 378 = 2/3.

#### Question No 76

What is 3/4 of 92 plus 13?

Solution!
(3/4) * 92 = 69! !69 + 13 = 82.

#### Question No 77

At an educational trip of a school ratio of boys to girls students was 4/5. how many students were on the tour?

Solution!
Data is insufficient for this problem. But we can find the answer from the options. As 4 + 5 = 9, So answer should be multiple of 9 to fullfil the condition of 4/5 ratio..

#### Question No 78

Ahmad reads 24 pages of a book in 15 minutes. The rate of pages read per minute by him will be

Solution!
24/15 = 8/5!8/5 = 1.6.

#### Question No 79

What is average of 2 , 5 and 8?

Solution!
(2+5+8)/3 = 15/3 = 5.

#### Question No 80

A cigarette case is full of cigars and cigarettes, probability of a cigarette is 8/15. What is the ratio of cigars to cigarettes.

Solution!
In 15 cigars and cigarettes there are 8 cigarettes So ratio between cigars and cigarettes is 8/7. Which means there are 8 cigarettes and 7 cigars..

#### Question No 81

What is 9 multiplied by 8?

Solution!
9 * 8 = 72.

#### Question No 82

When R is divided by 7 remainder is 3. What is the remainder when 3R is divided by 7?

Solution!
No answer description is available for this question..

#### Question No 83

49/10 + 49/10 + 49/10 = ?

Solution!
By taking LCM of these three terms we have! !(49+49+49)/10 = 147/10.

#### Question No 84

In a box ratio of DVD to VCD is 2/3. Which of the following cannot be the total number of CD's in the box?

Solution!
As 2+3 = 5, So total number of CD's must be multiple of 5.! !In the options all are multiple of 5 except 11! !So 11 is the correct answer..

#### Question No 85

Divide 52 by 4 and add 17 multiplied by 3.

Solution!
52 / 4 = 13! !17 * 3 = 51! !13 + 51 = 64.

#### Question No 86

Sum of three consecutive odd integers is 51. Which of the following is the smallest of the three?

Solution!
19+17+15 = 51.

#### Question No 87

Which one of the following is a prime number ?

Solution!
307 is only number which is divisible by 1 and by itself only..

#### Question No 88

What is the sum of first 5 positive even integers?

Solution!
2+4+6+8+10 = 30.

#### Question No 89

64% of the children in school are girls.What percentage are boys?

Solution!
100 - 64 = 36%.

#### Question No 90

Ali can type at a speed of 25 words per minute. How many words he can type in one hour?

Solution!
Typed words in 1 minute = 25!Typed words in 60 minutes = 60 * 25 = 1500.

#### Question No 91

A motorcyclist travels 200 Km in 1 hr. How many minutes if would take him to travel 120 Km?

Solution!
200 Km distance covered in minutes = 60! !1 Km distance covered in minutes = 60/200 = 3/10! !120 Km distance covered in minutes = (3/10) * 120 = 36 minutes.

#### Question No 92

In the first 10 overs of a cricket game the run rate was only 3.2 What should be the run rate in the remaining 40 overs to reach the target of 282?

Solution!
3.2 * 10 = 32! !After 10 overs score is 32.! !Remaining score = 282 - 32 = 250! !Required rate = 250 / 40 = 6.25 runs/over.

#### Question No 93

Average of 3 numbers is 15. What is the sum of 3 numbers?

Solution!
Let sum is x. ! !x/3 = 15!x = 15*3 = 45.

#### Question No 94

Deduct 7.3 from 34.2.

Solution!
34.2 - 7.3 = 26.9.

#### Question No 95

If n is not equal to 0, Which of the following must be greater than n? (1) 2n (2) n^2 (3) 2-n

Solution!
Square of every non zero integer is grater than the orignal number.! !*Note that multiple of 2 of negative numbers are lesser than the orignal number..

#### Question No 96

Multiply 86 by 9 and add to 13 multiplied by 6.

Solution!
86 * 9 = 774! !13 * 6 = 78! !774 + 78 = 852.

#### Question No 97

If one third of the staff at school are teachers find the ratio between teachers to non-teachers.

Solution!
ratio of teachers = 1/3! !ratio of non-teachers = 2/3! !Ratio of teachers to non-teachers = (1/3) * (3/2) = 1/2.

#### Question No 98

Divide 56 by 8 and add 17.

Solution!
56 / 8 = 7! !7 + 17 = 24.

#### Question No 99

2664/12/6=?

Solution!
(2664/12) * (1/6) = 37.

#### Question No 100

If m is an even integer and 3m < 48 and 2m > 24 then m = ?