| 7 | 21 | 15 |
| 49 | 441 | 225 |
| 98 | 882 | 450 |
| 140 | 1302 | ? |
A) 6750
B) 690
C) 1380
D) 660
Correct Answer: D
Solution :
\[49+98-7=147-7=140\] \[441+882-21=1323-21=1302\] \[225+450-15=675-15=660\]
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