The sum of ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child?

Father is aged three times more than his son Ronit. After 8 years, he would be two and a half times of Ronit's age. After further 8 years, how many times would he be of Ronit's age?

A father and son has a difference of 45 years in their age. Their ages are reverse of each other. Also, the present age of both of them contains prime numbers as the digits.

Dean Sam and Castiel are three brothers.
Interestingly their current age is prime.
What's more interesting that difference between their ages is also prime.

How old are they ?

Can you find the last number in the number sequence given below?

10 : 10 : 20 : 45 : 110 : 300 : ?

A father and son has a difference of 45 years in their age. Their ages are reverse of each other. Also, the present age of both of them contains prime numbers as the digits.

Can you tell how old both of them are at present?

Solve the quickfire maths brain teaser √9% = ?

We can create number 100 by using all numbers, i.e.0123456789 and mathematical operators (+/-) in many ways.
Example
98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition that the use of the number 21 is the must. Then there are only a few solutions.

One of such solution is:
98 - 7 - 6 - 5 - 4 + 3 + 21 = 100

Can you tell any other solution?

The sum of ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child?

Father is aged three times more than his son Ronit. After 8 years, he would be two and a half times of Ronit's age. After further 8 years, how many times would he be of Ronit's age?

A father and son has a difference of 45 years in their age. Their ages are reverse of each other. Also, the present age of both of them contains prime numbers as the digits.

Dean Sam and Castiel are three brothers.
Interestingly their current age is prime.
What's more interesting that difference between their ages is also prime.

How old are they ?

Can you find the last number in the number sequence given below?

10 : 10 : 20 : 45 : 110 : 300 : ?

A father and son has a difference of 45 years in their age. Their ages are reverse of each other. Also, the present age of both of them contains prime numbers as the digits.

Can you tell how old both of them are at present?

Solve the quickfire maths brain teaser √9% = ?

We can create number 100 by using all numbers, i.e.0123456789 and mathematical operators (+/-) in many ways.
Example
98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition that the use of the number 21 is the must. Then there are only a few solutions.

One of such solution is:
98 - 7 - 6 - 5 - 4 + 3 + 21 = 100

Can you tell any other solution?