Q5 of 67 Page 82

Find numbers from 100 to 400 that end with 0, 1, 4, 5, 6 or 9, which are perfect squares.

numbers from 100 to 400 that end with 0, 1, 4, 5, 6 or 9, which are perfect squares are:


102 = 100


112 = 121


122 = 144


132 = 169


142 = 196


152 = 225


162 = 256


172 = 289


182 = 324


192 = 361


202 = 400


More from this chapter

All 67 →
3

Make a list of all perfect squares from 1 to 500.

 4

Write 3-digit numbers ending with 0, 1, 4, 5, 6, 9, one for each

digit, but none of them is a perfect square.

 1

Find the sum 1 + 3 + 5 + … + 51 (the sum of all odd numbers from 1 to 51) without actually adding them.

 2

Express 144 as a sum of 12 odd numbers.