A 3-digit number, with all its digits as natural numbers, is 396 more than the 3-digit number formed by reversing the order of its digits. If the tens digit of the number is more than its hundreds digit, then how many such numbers are possible?

Container P contains alcohol and water in the ratio of 6 : 7 Container Q contains alcohol and water in the proportion 7 : 2. In what proportion should quantities be taken from P and Q to form a mixture in which alcohol and water are in the ratio of 7 : 6

If the roots of the equation 2ax2 + 2ax + 1 = 0 are real and distinct, then the number of possible integer value(s) 'a' can take between 1 and 4 (inclusive)??

group of 36 men decide to do work in ‘m’ days. But after 18 days they found that 40% of the work is completed. So 18 more people who were as e fficient as first lot of men joined them. job was completed as per the schedule. What is the value of 'm'?

A milkman mixes 5 liters of mineral water with 20 litres of pure milk thereby making a pro t of 40%. The selling price per litre of this mixture is 20 % more than the cost per litre of pure milk. The the ratio of cost of water/litre to milk/litre is???

If p and q are the roots of ax2 + bx + c = 0 and p3 and q3 are the roots of 1728x2 – 91x + 1 = 0, then nd the sum of roots of the equation cx2 + bx + a = 0.

A tomato seller sells half of his stock daily and 20% of the remaining stock gets spoiled overnight. How many tomatoes did he start with on his rst day if 234 tomatoes rotted over three nights

Asmita sell laptop to Beenu at 20% pro fit Beenu sells it to Chintu at 25% pro fit Chintu sells it to Deepika at 30% loss. Find the difference between the cost (in Rs.) incurred by Asmita and Deepika if the loss incurred by Chintu was Rs. 13,500

A father runs after his son, who is 1000 meters ahead. The father runs at a speed of 1 km every 8 minutes, and the son runs at a speed of 1 km every 12 minutes. How much distance (in meters) has the son covered at the point when the father overtakes him?

If the square of a natural number (N) has 35 factors, the number of factors of N may be equal to???

If log3 (4 + log2 x) = 2 and log7 (x + 13 + log3 y) = 2, then y – x is equal to ??

Log a b = log base a b

Given that |x2– 20| = 9x. If x is a real number, how many values can x take??

The HCF of two numbers is 21 and their LCM is 4641. If one of the numbers is between 200 and 300, find the other number.??

Find the value of the expression
1 – 6 + 2 – 7 + 3 – 8 +......... to 100 terms??

Find the sum to 200 terms of the series 1 + 4 + 6 + 5 + 11 + 6 +…….

A school has only 3 classes that contain
10, 20 and 30 students, respectively. The pass percentage of these classes are 20%, 30% and 40% respectively. Find the pass percentage of the entire school.??