Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 68 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
3. 3.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 7 (b) 70 (c) not enough info (d) 14
4. 4.🧩 Diya bought 2 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹120 (b) not enough info (c) ₹60 (d) ₹65
5. 5.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) 6 PM (c) 7 PM (d) not enough info
6. 6.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
7. 7.🧩 Diya is 7 years old. Arjun is older than Diya. How old is Arjun? (a) not enough info (b) 9 (c) 8 (d) 12
8. 8.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 4 (b) 40 (c) 8 (d) not enough info
9. 9.🧩 A box has 6 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 63 (b) 54 (c) 15 (d) not enough info
10. 10.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 6 PM
11. 11.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
12. 12.🧩 Aarav is 7 years old. Kabir is older than Aarav. How old is Kabir? (a) 8 (b) not enough info (c) 9 (d) 12
13. 13.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
14. 14.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
15. 15.🧩 Ananya is 8 years old. Rohan is 8 years older than Ananya. How old is Rohan? (a) 8 (b) 16 (c) 17 (d) not enough info
16. 16.🧩 Ishaan bought 2 notebooks and a bag for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹98 (c) ₹100 (d) ₹50
17. 17.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
19. 19.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
20. 20.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
21. 21.🧩 Arjun bought 2 pens for ₹70 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) not enough info (c) ₹70 (d) ₹35
22. 22.🧩 Rohan is 7 years old. Tara is 8 years older than Rohan. How old is Tara? (a) 16 (b) 8 (c) 15 (d) not enough info
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Kabir is 9 years old. Ananya is older than Kabir. How old is Ananya? (a) not enough info (b) 14 (c) 11 (d) 10
26. 26.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 5 PM
27. 27.🧩 Nisha bought 3 kites for ₹105 in all. Each kite cost the same. What did one kite cost? (a) ₹105 (b) not enough info (c) ₹35 (d) ₹40
28. 28.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
29. 29.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
30. 30.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
31. 31.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
32. 32.🧩 Arjun bought 5 kites for ₹275 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹275 (c) ₹55 (d) not enough info
33. 33.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
34. 34.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
35. 35.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 2 PM (c) 4 PM (d) not enough info
36. 36.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
37. 37.🧩 Nisha is 11 years old. Ishaan is 9 years older than Nisha. How old is Ishaan? (a) not enough info (b) 9 (c) 20 (d) 21
38. 38.🧩 Tara is 7 years old. Ananya is older than Tara. How old is Ananya? (a) 8 (b) 9 (c) not enough info (d) 12
39. 39.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
40. 40.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) 14 (c) not enough info (d) 70

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