The simple interest on a sum for 5 years is twofifth of the sum. The rate of interest per annum is
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A man has some hens and some cows. If the total number of heads of hens and cows together is 50 and the nunber of feet of hens and cows together is 142, then the number of cows is
What is the effective discount (in %) on two successive discounts of 20% and 10%?
A minimum wage _____.
Thumba in Kerala is famous because ___.
An element has an atomic weight of W and an atomic number of N. The number of protons in the nucleus of its atom is
Curd contains mainly ___ acid.
Atomic mass of Sulphur is 32 u. The number of moles in 16 grams of Sulphur is: