I see you need help with 14 - 23 evens, so hopefully this is what you need. If not, comment and I will edit it as appropriate :) Have a nice day
14: It is slightly hard to see, but I am going to say 15 mm. We can decide this because the ruler says it is in mm and on both sides are 10 and 20. It is in the middle so we will decide the answer is 15.
16: 3,629 - 429 = 3,198 (not much explanation, just use a calculator or do the subtractation)
18: 491 * 700 = 343,700 (multiply 491 * 7, then add the two zeros onto the end of the answer because it's 700, not 7)
20: 5n = 3,175 ; n = 635 (divide both sides of the equation by 5)
22: See pictured below
After that, 2/3 is equal to 0.66666666666, which we can round to 67%
Even though it is not an even, you said "14 - 23" so here is 23 as well:
230, 240, 250, 260, 270, etc
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256 is inbetween here
It is above 5, so the answer is C 260
