| Question | Which of the following is the output of 495 * 495 – 105 * 105? | |
| Type | multiple_choice | |
| Option | 234000 | correct |
| Option | 360000 | incorrect |
| Option | 300000 | incorrect |
| Option | 350000 | incorrect |
| Solution | Apply formula; (a2– b2) = (a – b) (a+b) 495 x 495 – 105 x 105 = (4952– 1052) = (495 – 105) (495 + 105) = 390 * 600 = 234000 | |
