How do you stop a vtx 1300 from backfiring?

What is a counter example to falsify If x is an integer divisible by 3 then x2 is an integer divisible by 3? Are integers always rational? How do you round 19.95 to the nearest tenth? What is the opposite word for the prime number? How do you express 140 percent as a decimal? What is eight twelfths to a fraction? What is 30000 increased by a factor of 4? How do you write one thousand and five dollars? What are the common multiples of 23 and 40? What are the significant figures in 5.10? What is the verb in Bob reaches for the apple pn the counter? Are there more prime numbers between 1 and 100 or 100 and 200? How Hot water at the hand sink should be at least? Convert 4.5 to fraction form? What is half a percent of 20 million? What is 0.283 rounded to the nearest tenth? What is 96.45 to 3 significant figures? Prime numbers in beween 35 amd 45? How would you write the number 67.915? What is 15 over 40 as a percentage?