Express 31 and 55 as the sum of any three odd primes.

Write the smallest and the biggest three digit composite number.

The digits of the prime number 13 can be reversed to get another prime number 31. Find if any such pairs exist upto 100.

Each of the composite numbers has atleast three factors. Justify this statement with an example.

I am a two digit prime number and the sum of my digits is 10. I am also one of the factors of 57. Who am I?

The LCM of two numbers is 210 and their HCF is 14. How many such pairs are possible?

Every even number greater than 2 can be expressed as the sum of two prime numbers. Verify this statement for every even number upto 16.

Janaki bought 650 mg of a tablet. What is its weight in gram?

Change the following into 12 hour format
(i) 02:00 hours
(ii) 08:45 hours
(iii) 21:10 hours
(iv) 11:20 hours
(v) 00:00 hours

Find the number of days between the Republic day and Kalvi Valarchi Day in 2020.

The saplings are planted at a distance of 2 m 50 cm in the road of length 5 km by saravanan. If he has 2560 saplings, how many saplings will be planted by him? how many saplings are left?

A squirrel wants to eat the grains quickly. Help the Squirrel to find the shortest way to reach the grains. (Use your scale to measure length of the line segments)

A post office functions from 10 a.m to 5.45 p.m with a lunch break of 1 hour. If the post office works for 6 days a week, find the total duration of working hours in a week.

Pari bought a Motor cycle for Rs. 55,000 and he gained Rs. 5500 on selling the same. What is the selling price of the motor cycle?

Sugan bought a Jeans pant for Rs. 750. It did not fit him. He sold it to his friend for Rs. 710. Find the profit or loss to sugan.

Amutha marked her home product of pickle as Rs. 300 per pack. But she sold it for only Rs. 275 per pack. What was the discount offered by her per pack?

A stationery shop owner bought a scientific calculator for Rs. 750. He had put a battery worth Rs. 100 in it. He had spent Rs. 50 for its outer pouch. He was able to sell it for Rs. 850. Find his profit or loss.

A store purchased pens at Rs. 216 per dozen. He paid Rs. 58 for conveyance and sold the pens at the discount of Rs. 2 per pen and made a overall profit of Rs. 50. Find the M.P. of each pen.

An electrician buys a used T.V. for Rs. 12,000 and a used Fridge for Rs. 11,000. After spending Rs. 1000 on repairing the T.V. and Rs. 1500 on painting the Fridge, he fixes up the M.P. of T.V. as Rs. 15,000 and that of Fridge as Rs. 15,500. If he gives Rs. 1000 discount on each find his profit or loss.

Classify the given triangles based on its sides as scalene, isosceles or equilateral.

Classify the following triangles based on its sides and angles.

What are the angles of an isosceles right angled triangle?

The diagram shows a square ABCD. If the line segment joins A and C, then mention the type of triangles so formed.

Is a triangle possible with the angles 90°, 90° and 0°? Why?

If one angle of an isosceles triangle is 70°, then find the possibilities for the other two angles.