Question
Find the unit digit in (257)45 ×
(248)73.Solution
To find the units digit of (257)45 x (248)773: Units digit of 257 is 7. The pattern for powers of 7 (7, 9, 3, 1) repeats every 4. Since 45 mod 4 = 1, the units digit of 745 is 7. Units digit of 248 is 8. The pattern for powers of 8 (8, 4, 2, 6) repeats every 4. Since 73 mod 4 = 1, the units digit of 873 is 8. Multiply the results: 7 x 8 = 56. Unit digit =6.
What will come in place of the question mark (?) in the following series?
1528, 1416, 1204, ?, 480, -32
143 Â Â Â Â 119Â Â Â Â 107Â Â Â Â 101Â Â Â Â Â 98Â Â Â Â ?
96 89 ? 90 94 91
...What value should come in the place of (?) in the following number series?
19, 235, 260, 324, 333, ?
What will come in place of the question mark (?) in the following series?
305...
In each of the following number series, one term is missing. Find the missing term.
3, 5, 20, 24, 144, 150, ?
1029, 1030, 1039, 1064, ?, 1194
75, 80, 95, ?, 155, 200
What will come in place of the question mark (?) in the following series?
1515, 184, ?, 455, 967, 624
7 29 61 ? 211 349
...
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