Question
If 65x is a three-digit number and it is divisible by 6,
what can be the value of the digit x?Solution
If a number is divisible by 6, it must be divisible by both 2 and 3 In 65x, if this number is divisible by 2, the value of x must be even. So, it can be 0,2,4,6 or 8 65x is divisible by 3, If sum of its digits is a multiple of 3 6+5+x =11+x, if we put x =0, 11+0=11, not a multiple of 3 If put x =2, 11+2=13 not a multiple of 3 If put x =4, 11+4=15, is a multiple of 3 If put x =6, 11+6=17, not a multiple of 3 If put x =8, 11+8=19, not a multiple of 3 The value of x is 4.
Which of the following is an example of symbiosis?
What is the product of the reaction?
CH₃COOH + CH₃OH → (H⁺, heat)
In a nuclear reactor, one of the following is used as a fuel.
1 mole of carbon atoms = ______ g of carbon atoms
Two capacitors of capacitance 6 µF and 3 µF are connected in series across a battery of constant voltage.
The charges stored on the two capaci...
Group number and valency have no relation in
In Bohr’s model of the hydrogen atom, electrons in “stationary” orbits do not emit radiation continuously because:
The primary reason that smoking cigarettes is bad for our health is that cigarette smoke _______.
Chemical equation is balanced according to the law of
Consider the following statements regarding antibiotics
1. They are used to destroy disease-causing bacteria.
2. They can be applied to th...
Relevant for Exams:
