Time Sequence
- If it is possible to make a number which is perfect square of a two-digit odd number with the second, the sixth and ninth digits of the number 187642539. which of the following is the digit in the unit’s place of that two-digit odd number?
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The specified digits are 8, 2 and 9. Now, we know a perfect square number does not have 8 and 2 at unit’s place. Therefore, we can make only two three-digit numbers from it, i.e., 829 and 289. Among these two numbers, 289 is a perfect square number, i.e., square of 17. Thus, unit’s digit is 7 and ten’s digit is 1.
Correct Option: B
The specified digits are 8, 2 and 9. Now, we know a perfect square number does not have 8 and 2 at unit’s place. Therefore, we can make only two three-digit numbers from it, i.e., 829 and 289. Among these two numbers, 289 is a perfect square number, i.e., square of 17. Thus, unit’s digit is 7 and ten’s digit is 1.
- Find out how many times 2, 3 and 7 have present together, and always 3 in middle and 2 and 7 places either side of 3? 1 1 1 1 3 3 2 2 2 3 7 7 3 3 3 6 6 4 7 3 2 4 9 8 7 7 3 2 3 3 3 4 4 2 3 7
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Four times 3 present together with 2 and 7, where 2 and 7 present either side of 3.
1 1 1 1 3 3 2 2 [2 3 7] 7 3 3 3 6 6 4 [7 3 2] 4 9 8 7 [7 3 2] 3 3 3 4 4 [2 3 7]Correct Option: D
Four times 3 present together with 2 and 7, where 2 and 7 present either side of 3.
1 1 1 1 3 3 2 2 [2 3 7] 7 3 3 3 6 6 4 [7 3 2] 4 9 8 7 [7 3 2] 3 3 3 4 4 [2 3 7]
