Question
The effluents of which among the following industries
are considered to be the main cause for lowering the pH value of river water?Solution
The correct answer is A
Three numbers are in the ratio 4 : 9 : 13 and their LCM is 2340. Their HCF is:
Let N be the greatest number that will divide 86, 120, 154 leaving the same remainder in each case. Then sum of the digits in N is:
The fruit-seller wants to pack the boxes with apples. If he packs 4 or 5 apples per box then he is left with 3 apples but if he packs with 8 or 9 apple...
Find the total number of Prime factor in the given expression?
315 × 56 × 68
Sum of the two numbers is 42. LCM and HCF of that two number is 72 and 6 respectively. Find the sum of reciprocals of the numbers?
What is the unit digit of the sum of 3694 and the product of 214 and 123?
The HCF of a^6 - 1 and a^4+ 2a^3- 2a-1 is
- The product of two numbers is 3888 and their L.C.M is 324. What is the H.C.F of the two numbers?
The least number which when divided by 6, 8, 9 and 12 leave zero remainder in each case and when divided by 13 leaves a remainder of 7 is:
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