[Forest Guard, 2022]
6. 10 persons at a party shake hands once with everyone else in the room. How handshakes took place ?
66
64
45
None of the above
7. Current population of a town is 50000. It is growing at the rate of 5% in first year 4% in second year and 2% in third year. The population at the end of third year is ______
55500
55692
54600
54692
8. A merchant has 1000 kg of sugar part of which he sells profit of 9% and rest of the sugar he sells at 19% profit. His overall gain is 15%. The quantity sold at 9% profit is _______
600 kg
400 kg
560 kg
640 kg
9. If each side of a square is increased by 30% find the percentage change in the area.
56.25
65
69
10. If the cost price of 18 notebooks is equal to selling price of 10 notebooks, the price in percentage on cost price is:
50%
80%
100%