MATHS PUZZLES

1. What is the following number? 18, 21, 24, 27, 30, 33, 36, ______________

           Answer: Here the pattern to be observed is: every successive number is greater by 3. So the sequence will be: 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, and so on.

2. What is the following number? 53, 51, 49, 47, 45, 43, _______________

      Answer: Here the pattern to be observed is: every successive number is smaller by 2. So the sequence will be: 53, 51, 49, 47, 45, 43, 41, 39, 37, 35, and so on.

3. Hari had 6 siblings who were born all born 2 years apart. The youngest is Richa who is only 7 years old while Hari is the oldest. What is Hari’s age?

        Answer: Richa, the youngest sibling is 7 years old. Each sibling was born 2 years apart, and there are total seven children (Hari and his 6 siblings). So Hari’s age is: 7 + 2 + 2 + 2 + 2 + 2 + 2 = 19.

4. The principal is constructing a square playground for the children of her school. She wanted to fence the area with four exits around the playground so that the ground was accessible from all sides. If she used 27 poles on each side of the playground, how many poles would be needed in total?   

          Answer: 104 poles. The 4 corner poles will be common to two sides. Hence: (25 poles x 4 sides) + 4 corner poles= 104 poles

5. What weighs more – A kilo of apples or a kilo of feathers?                                  

        Answer: They weigh the same. Each weighs exactly a kilo.