Sum of squares of three consecutive numbers is 974. Find the sum of first and third number.
Let the numbers be (x – 1), x and (x + 1) => (x – 1)2 + x2 + (x + 1)2 = 974 => x2 – 2x + 1 + x2 + x2 + 2x + 1 = 974 => 3x2 = 974- 2 => x2 = 972/3 => x2 = 324 => x = 18 Required sum = (18 – 1) + (18 + 1) = 36
The heating element in an electric heater is made of which element?
What type of sugar is maltose classified as?
Which of the following is not the Ore of Aluminium?
Soap is prepared by boiling caustic soda with -
Based on the periodic trends for ionization energy, which element has the highest ionization energy?
What is the atomic number of Bohrium, named after the physicist Niels Bohr?
Manganite is an ore/mineral of -
Which of the following is acidic in nature?
Hydrogen was discovered by:
What change occurs when camphor is heated?
