Two circles have a radius relation. Area of the square is 196 cm². Find radius. A. 12π B. 16π C. 24π D. 32π Explanation: Side=14, radius=7×? → area relation.
Three numbers: 5/7 of the first equals 48% of the second, and the second is 1/9 of the third. Find first. A. 168 B. 84 C. 42 D. 21 Explanation: Solve the proportion.
In a zoo, the total number of heads is 60. Animals are rabbits and peacocks. Find count. A. 30 B. 46 C. 40 D. None Explanation: Insufficient data.
Four prime numbers in ascending order, given the condition. Find the second number. A. 17 B. 29 C. 23 D. 31 Explanation: Based on the given pattern.
Four prime numbers in ascending order have the smallest difference. Find the smallest. A. 5 B. 7 C. 11 D. 13 Explanation: The closest primes start at 5.
In a group of 30 people, if everyone shakes hands once, how many handshakes? A. 870 B. 435 C. 30! D. 29! +1 Explanation: n(n−1)/2.
21 poles equally spaced. Time taken by car is ____. A. 39 sec B. 40 sec C. 39.38 sec D. 39.5 sec Explanation: Number of intervals = poles−1.
Geometry comes from Greek words meaning ____. A. Earth measure B. Line measure C. Angle measure D. Space measure Explanation: Geo = earth, metry = measurement.
A wire bent into a square encloses 484 cm². If reshaped, find a new area. A. 484 cm² B. 538 2/7 cm² C. 616 cm² D. 644 cm² Explanation: Perimeter conserved.
Wheels with revolutions 15, 20 and 48 meet again after ____. A. 1 min B. 2 min C. 3 min D. None Explanation: LCM concept.