Number System MCQs with Answers & Explanations

Step-by-step solution: 1. Align the numbers vertically. 2. Subtract the ones, tens, and hundreds to obtain 254. 3. Confirm the result: 332 - 78 = 254.

Step-by-step solution: 1. Recognize that division asks how many times 15 fits into 195. 2. 195 = 15 * 13. 3. So, 195 / 15 = 13.

Step-by-step solution: 1. Multiply 18 by 14. 2. Break the multiplication into tens and ones for clarity. 3. Combine partial products to get 252.

Step-by-step solution: 1. Multiply 12 by 15. 2. Break the multiplication into tens and ones for clarity. 3. Combine partial products to get 180.

Step-by-step solution: 1. Align the numbers vertically. 2. Subtract the ones, tens, and hundreds to obtain 188. 3. Confirm the result: 284 - 96 = 188.

Step-by-step solution: 1. Add the ones place: 0 + 5. 2. Add the tens and hundreds to get 325. 3. Therefore, 240 + 85 = 325.

Step-by-step solution: 1. Align the numbers vertically. 2. Subtract the ones, tens, and hundreds to obtain 140. 3. Confirm the result: 220 - 80 = 140.

Step-by-step solution: 1. Add the ones place: 4 + 7. 2. Add the tens and hundreds to get 221. 3. Therefore, 144 + 77 = 221.

Step-by-step solution: 1. Align the numbers vertically. 2. Subtract the ones, tens, and hundreds to obtain 266. 3. Confirm the result: 348 - 82 = 266.

Step-by-step solution: 1. Multiply 21 by 11. 2. Break the multiplication into tens and ones for clarity. 3. Combine partial products to get 231.

Step-by-step solution: 1. Align the numbers vertically. 2. Subtract the ones, tens, and hundreds to obtain 392. 3. Confirm the result: 476 - 84 = 392.

Step-by-step solution: 1. Recognize that division asks how many times 15 fits into 120. 2. 120 = 15 * 8. 3. So, 120 / 15 = 8.

Step-by-step solution: 1. Recognize that division asks how many times 7 fits into 91. 2. 91 = 7 * 13. 3. So, 91 / 7 = 13.

Step-by-step solution: 1. Add the ones place: 2 + 1. 2. Add the tens and hundreds to get 453. 3. Therefore, 372 + 81 = 453.

Step-by-step solution: 1. Multiply 24 by 8. 2. Break the multiplication into tens and ones for clarity. 3. Combine partial products to get 192.

Step-by-step solution: 1. Recognize that division asks how many times 11 fits into 66. 2. 66 = 11 * 6. 3. So, 66 / 11 = 6.

Step-by-step solution: 1. Multiply 14 by 13. 2. Break the multiplication into tens and ones for clarity. 3. Combine partial products to get 182.

Step-by-step solution: 1. Multiply 17 by 10. 2. Break the multiplication into tens and ones for clarity. 3. Combine partial products to get 170.

Step-by-step solution: 1. Add the ones place: 0 + 5. 2. Add the tens and hundreds to get 205. 3. Therefore, 120 + 85 = 205.

Step-by-step solution: 1. Align the numbers vertically. 2. Subtract the ones, tens, and hundreds to obtain 494. 3. Confirm the result: 572 - 78 = 494.