The average temperature on Wednesday, Thursday and Friday was 25. The average temperature on Thursday ,Friday and Saturday was 24. If the temperature on Saturday was 27, what was the temperature on Wednesday?

Total temperature on Wednesday, Thursday and Friday was 25 Ã— 3 = 75

Total temperature on Thursday ,Friday and Saturday was 24 Ã— 3 = 72

Hence, difference b/ w the temperature on Wednesday and Saturday = 3

If Saturday temperature = 27, then Wednesday temperature = 27 + 3 = 30

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The present ages of Lewis and Brown is 1:2. Three years from now their ages be in ratio 3:5. Find the age of Brown after 5years?

Let

Brown=b

Lewis=l

Present ages be b/l=1:2

2l-b=0....eq(1)

After three years l+3/b+3=3:5

5l-3b=6

By resolving eq

b=12

l=6

After 5 years l= 11

b=17

A man has a daughter and a son. The son is is three years older than the daughter. In one year the man will be six time as old as the daughter is now. In ten years the man will be fourteen years older than the combined ages of his children at that time. what is the man's present age?

Let's the age of daughter=x

age f son = x+3

age of father now=6x-1

condition:

M+0={(S+D)+ 10}+14]

6x-1=[{(x+3)+10}+14]

4x=28

x=7

Father's age=(6x-7)-1=41

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In following questions, one term in number series is incorrect.

Find out the incorrect number 5, 27, 61, 122, 213, 340, 509

Find out the incorrect number 5, 27, 61, 122, 213, 340, 509

The correct sequence is 2

So, 27 is wrong and should be replaced by 3

. A man has a certain number of small boxes to pack into parcles. If he packs 3, 4, 5 or 6 in a parcel, he is left with one over; if he packs 7 in a parcle, none is left over. What is the number of boxes, he may have to pack?

Clearly, the required number would be such that it leaves a remainder of 1 when divided by 3, 4, 5, or 6 and no remainder when divided by 7. Thus, the number must be of the form (L.C.M of 3, 4, 5, 6) x + 1 i.e., (60x + 1 ) and a multiple of 7. Clearly, for x = 5, the number is a multiple of 7. So the number is 301.

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The average temperature on Wednesday, Thursday and Friday was 25. The average temperature on Thursday, Friday and Saturday was 24. If the temperature on Wednesday was 30, what was the temperature on Wednesday?

Total temperature on Wednesday, Thursday and Friday was 25 Ã—3 = 75

Total temperature on Thursday, Friday and Saturday was 24 Ã—3 = 72

So, difference b/w the temperature on Wednesday and Saturday = 3

If Wednesday temperatures = 30 ,then Saturday temperature = 30 - 2 = 27

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A family consists of six members P, Q, R, X, Y and Z. Q is the son of R but R is not mother of Q. P and R are a married couple. Y is the brother of R. X is the daughter of P. Z is the brother of P. Who is the brother-in-law of R?

Q is the son of R but R is not the mother. So, R is the father of Q. P is married to R. So, P is the wife of R and the mother of Q. X is the daughter of P and hence of R and so she is the sister of Q. Y is the brother of R and Z is the brother of P. R is the husband of P and Z is the brother of P. So, Z is the brother-in-law of R..

In 1772 Sophia was thrice as jim but in 1775 Sofia was only twice as old as jim was. How many old was jim in 1784?

Let's

In 1772

Sofia age's= x jim age's y

When Sofia was thrice as jim

x = 3y.....(1)

but after 5 years Sofia was twice.

X + 5 = 2( Y + 5)....... (2)

by substituting equations.

Y=5

but after 12 years

in 1784 jim was: 17

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