1) 81 2) 12 3) 66 4) 69 Answer: (4) 69 Solution: Given, x2 + y2 <25 x and y can have possible values between (0,±1,±2,±3,±4) Therefore,... View Article
1) 1 2) 0 3) 4 4) Infinite Answer: (3) 4 Solution: We have two lines L1 and L2 intersecting each other Therefore, if we draw a graph for... View Article
1) 10C2 x 10C8 2)10C2 x 2! x 10C8 x 8! 3) 10C3 x 3! x 10C7 4) none of these Answer: (2)10C2 x 2! x 10C8 x 8! Solution: Number of chair =... View Article
1) 390 2) 600 3) 540 4) 450 Answer: (3) 540 Solution: Given the word MATHEMATICS Now without repetition the letter we have here = H, E, C,... View Article
1) 31 2) 32 3) 33 4) none of these Answer: (4) Solution: Any set of numbers is divisible by number added to the factorial. Therefore, there... View Article
1) 25 2) 21 3) 18 4) 15 Answer: (2) 21 Solution: 13 can be accommodated in upper deck and 7 in the lower deck 5 passengers refused to sit... View Article
1) 9 or 10 2) 10 or 11 3) 11 or 12 4) 12 or 13 Answer: (2) 10 or 11 Solution: Given, there are 21 students Teacher has to make n groups of... View Article
The two types of magnetic forces are attractive magnetic forces and repulsive magnetic forces. The former pulls two magnetic substances towards... View Article
A determinant can help find the inverse of a matrix. Determinants are known to be useful for capturing how linear transformation change area or... View Article
Exponential functions where the exponent is an even number such as f(x) = x2 or f(x) = x4 are always positive for all real values of x.... View Article
For a base to be classified as a weak base, it must have a pH value in the range of 7 - 10. Similar to weak acids, weak bases do not completely... View Article
While calculating the atomic mass of an element, the mass of any electrons is usually ignored and atom's mass is generally calulated based only... View Article
In mathematics (more specifically algebra), a conjugate in the middle of two terms is associated with a change the sign (such as plus to minus or... View Article
Ammonium chloride (chemical formula NH4Cl) is an acidic salt since it is a salt of a strong acid, namely hydrochloric acid, and a weak base,... View Article
Two general categories of peroxides are known to exist in which either one of the oxygen atoms or both the oxygen atoms are covalently bonded to... View Article
