If 5@1 = 60; 12@8 = 200; 16@2 = 180; then what is the value of 16@10 = ?
1). 32
2). 11
3). 9
4). 260
5@1 = (5 + 1) × 10 = 6 × 10 = 60
12@8 = (12 + 8) × 10 = 20 × 10 = 200
16@2 = (16 + 2) × 10 = 18 × 10 = 180
Similarly,
16@10 = (16 + 10) × 10 = 26 × 10 = 260
Hence, answer is 260.7. A tree was planted in 2012. How old it will be in year 2056?
8. Direction: Find the value of the following equation. 18 + 25 - 31 + 41 × 5 - 451 + 1089
9. If 73 × 69 × 43 = 185 and 41 × 53 × 68 = 162, then 11 × 31 × 71 = ?
10. If 6α1 = 70, 2α3 = 50 and 4α5 = 90, then find the value of 1α4 = ?