Which of the following numbers would have digit 6 at unit place.
(i) 192 (ii) 242 (iii) 262
(iv) 362 (v) 342
(i) 192: Unit’s place digit = 9
∴ 192 would not have unit’s digit as 6.
(ii) 242: Unit’s place digit = 4
∴ 242 would have unit’s digit as 6.
(iii) 262: Unit’s place digit = 6
∴ 262 would have 6 as unit’s place.
(iv) 362: Unit place digit = 6
∴ 362 would end in 6.
(v) 342: Since, the unit place digit is 4
∴ 342 would have unit place digit as 6.
Find the perfect square numbers between (i) 30 and 40 and (ii) 50 and 60.
1. Can we say whether the following numbers are perfect squares? How do we know?
(i) 1057 (ii) 23453 (iii) 7928
(iv) 222222 (v) 1069 (vi) 2061
Write five numbers which you can decide by looking at their one’s digit that they are not square numbers.
Write five numbers which you cannot decide just by looking at their unit’s digit (or one’s place) whether they are square numbers or not.
Which of 1232, 772 822, 1612, 1092 would end with digit 1?
