Let the age of youngest child be y.
Then y + ( y + 2 ) = ( 24 x 6 ) - ( 24 x 4 + 4 x 10)

Correct Option: C

Let the age of youngest child be y.
Then y + ( y + 2 ) = ( 24 x 6 ) - ( 24 x 4 + 4 x 10)
= 144 - 136
⇒ 2y + 2 = 8
∴ y =3 years

M + T + W = 3 x 37 = 111° C .....(1)
T + W + Th = 3 x 34 = 102 ° C ......(ii)
Let M = y
Then, Th = 4y / 5

Correct Option: C

M + T + W = 3 x 37 = 111° C .....(1)
T + W + Th = 3 x 34 = 102 ° C ......(ii)
Let M = y
Then, Th = 4y/5
subtraction (ii) from (i) we get,
M - Th = 9° C
⇒ y - 4y / 5 = 9° C
⇒ y = 45° C
∴ Temperature on thursday = (4 x 45) / 5° C
= 36° C

Increase in sum of age during 3 years = 3 x 5 years

Correct Option: D

Increase in sum of age during 3 years = 3 x 5 years
= 15 years
So , the difference between ages of old and new member is 15 years

Decrease in sum of age = 11 x 2 months
= 1 year 10 months

Total age of reserves = (17 + 20 ) years - (1 year 10 month)
= 35 years 2 months

Correct Option: B

Decrease in sum of age = 11 x 2 months
= 1 year 10 months

Total age of reserves = (17 + 20 ) years - (1 year 10 month)
= 35 years 2 months

Average age of the reserves = (35 years 2 months ) / 2
= 17 years 7 months

Total age of Ram and shyam 5 years ago
= 2 x 20 = 40 years

∴ Total age of Ram and Shyam at present
= (40 + 5 + 5 ) = 50 years
Mohan's age now

Correct Option: B

Total age of Ram and shyam 5 years ago
= 2 x 20 = 40 years
∴ Total age of Ram and Shyam at present
= 40 + 5 + 5 = 50 years

Mohan's age now =90 - 50 years = 40 years

Mohan's age 10 years hence = 40 + 10 years
= 50 years