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A neutral solution has equal concentrations of hydrogen (H⁺) and hydroxide (OH⁻) ions, giving it a pH of 7 at 25°C.
Let N be the greatest number that will divide 72, 105, 138 leaving the same remainder in each case. Then sum of the digits in N is:
The ratio of two numbers is 12:14 and their LCM is 168. The numbers are:
The HCF of two numbers is 9. Which of the following can never be their LCM?
HCF of two numbers 64 and 96 can be expressed in the form of (20m – 108) whereas LCM of these two numbers can be expressed in the form of (60n – 18)...
Find the greatest number of 4 digits divisible by 15, 25, 40 and 75.
Find the LCM of 25/14, 15/28, 30/21
The sum of two numbers is 99 and their HCF is 9. Total number of such pairs of numbers is?
Find the LCM of x² – 8x + 15 and x² – 5x + 6 is.
