[B].
[C].
[D].
Answer: Option A
Explanation:
| 1397 x 1397 | = (1397)2 |
| = (1400 – 3)2 | |
| = (1400)2 + (3)2 – (2 x 1400 x 3) | |
| = 1960000 + 9 – 8400 | |
| = 1960009 – 8400 | |
| = 1951609. |
[B].
[C].
[D].
Answer: Option C
Explanation:
| 1904 x 1904 | = (1904)2 |
| = (1900 + 4)2 | |
| = (1900)2 + (4)2 + (2 x 1900 x 4) | |
| = 3610000 + 16 + 15200. | |
| = 3625216. |
[B].
[C].
[D].
Answer: Option B
Explanation:
| 2056 x 987 | = 2056 x (1000 – 13) |
| = 2056 x 1000 – 2056 x 13 | |
| = 2056000 – 26728 | |
| = 2029272. |
[B].
[C].
[D].
Answer: Option A
Explanation:
| 72519 x 9999 | = 72519 x (10000 – 1) |
| = 72519 x 10000 – 72519 x 1 | |
| = 725190000 – 72519 | |
| = 725117481. |
[B].
[C].
[D].
Answer: Option B
Explanation:
| 3897 x 999 | = 3897 x (1000 – 1) |
| = 3897 x 1000 – 3897 x 1 | |
| = 3897000 – 3897 | |
| = 3893103. |
[B].
[C].
[D].
Answer: Option A
Explanation:
| 587 x 999 | = 587 x (1000 – 1) |
| = 587 x 1000 – 587 x 1 | |
| = 587000 – 587 | |
| = 586413. |
[B].
[C].
[D].
Answer: Option C
Explanation:
Required difference = (700000 – 70) = 699930
The difference between the place values of two sevens in the numeral 69758472 is Read More »
Aptitude, Numbers[B].
[C].
[D].
Answer: Option A
Explanation:
| 5358 x 51 | = 5358 x (50 + 1) |
| = 5358 x 50 + 5358 x 1 | |
| = 267900 + 5358 | |
| = 273258. |
[B].
[C].
[D].
Answer: Option C
Explanation:
| Given Exp. = 35 + 15 x | 3 | = 35 + | 45 | = 35 + 22.5 = 57.5 |
| 2 | 2 |
[B].
[C].
[D].
Answer: Option A
Explanation:
| Given Exp. = | (12)3 x 64 | = | (12)3 x 64 | = (12)2 x 62 = (72)2 = 5184 |
| 432 | 12 x 62 |
(12)3 x 64 ÷ 432 = ? Read More »
Aptitude, Numbers