In the diagram above, |PQ| = |QR|, |PS| = |RS|, ∠PSR = 30o and ∠PQR = 80o. Find ∠SPQ.

Simplify 313 1 3 - 114 1 4 x 23 2 3 + 125

What is the product of 2751 27 5 1 (3)-3 and (1)−15 ( 1 ) − 1 5 ?

If 2257 is the result of subtracting 4577 from 7056 in base n, find n

Simplify 2log 25 2 5 - log72125 72 125 + log 9

Find correct to 3 decimal places (10.05 1 0.05 + 15.005 1 5.005 ) - (0.05 x 2.05)

Simplify 11+?5 1 1 + 5 - 11??5

If 3 gallons of spirit containing 20% water are added to 5 gallons of another spirit containing 15% water, what percentage of the mixture is water?

Factory P produces 20,000 bags of cement per day while factory Q produces 15,000 bags per day. If P reduces production by 5% and Q increases production by 5%...