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The Present Perfect Tense is not used with the Adverbs of past time like yesterday, in 1990 etc. Here Past Indefinite Tense is used. So, ‘I heard’ is correct. I heard a lot of radio yesterday because I had to drive to and from South Caulfield twice in as many days to get my MA thesis bound.
(65% of 120) = 25% of ? - 22
416 ÷ 8 + 132 – 25% of 420 = ?
44% of 1900 + 25% of ? = 9000
65% of 102 + 14 = ? – 20
125 + 64% of 250 = 150 + ?
29% of 400 + 66% of 1100 - 50% of 1200 = ?
If x + y + 3 = 0, then find the value of x3 + y3 – 9xy + 9.
9999² + 1111² =?
[4(1/3) + 4(1/4)] × 24 – 62 = ?2
(-251 × 21 × -12) ÷ ? = 158.13