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The present age of a father and his son are in ratio 7: 2. Five years ago the ratio was 6: 1. Find the sum of their present ages.

A45 years

B40 years

C35 years

D30 years

উত্তর : A.

45 years

শেয়ার :

সম্পর্কিত প্রশ্ন সমূহ

১.

In a geometric progression, the 3rd term is 12 and the 6th term is 96. Find the sum of the first 8 terms.

A510

B765

C1020

DNone

২.

How many positive divisors of 7200 are perfect squares?

B10

C12

D15

৩.

For $x > 0$ , what is the minimum value of $x\:+\:\frac{16}{x}$ =?

C12

D16

৪.

A cistern is normally filled in 6 hours, but a leak makes it take 8 hours. How long would the leak alone take to empty a ful cistern?

A24 hours

B30 hours

C36 hours

D48 hours

৫.

Nasif's watch gains 4 minutes per hour. It was correct at 2:00 pm yesterday. When it displays 6:00 am today. What is the accurate time?

4 : 00 am

4 : 30 am

5 : 00 am

5 : 30 am

৬.

ab is negative and $a² + b²$ is greater than o, but less than 114. What is the minimum value of ab?

$-45$

$-48$

$-49$

$-56$

৭.

If positive integers m and n satisfy $m + n < 10$ , how many distinct values can mn assume?

A16

B17

C18

D20

৮.

Find the smallest positive integer that leaves remainder 3 when divided by 7, remainder 4 when divided by 9, and remainder 8 when divided by 11.

A256

B283

C361

D428

৯.

A circular garden's diameter has endpoints at coordinates (2, 3) and (8, 11). Find its area in terms of π.

A100π

B50π

C25π

D10π

১০.

Nasrin and Farid can finish a project in 12 and 18 days. They work together for 4 days, then Nasirin leaves. How many more days does Farid need?

A6 days

B8 days

C12 days

D13 days