Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 873 · 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.🧩 Kabir bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) not enough info (c) ₹25 (d) ₹60
2. 2.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 4 PM
3. 3.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) not enough info (b) 4 (c) 40 (d) 8
4. 4.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
5. 5.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Kabir is 6 years old. Diya is older than Kabir. How old is Diya? (a) not enough info (b) 7 (c) 8 (d) 11
7. 7.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Ananya bought 4 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹20 (c) not enough info (d) ₹60
9. 9.🧩 Ananya bought 2 notebooks for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹30 (c) ₹50 (d) not enough info
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
11. 11.🥭 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, mangoes match (c) yes, it is certain (d) no mango is sweet
12. 12.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
13. 13.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
14. 14.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 8 PM (c) 5 PM (d) not enough info
15. 15.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) 80 (c) not enough info (d) 16
16. 16.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) 7 PM (d) not enough info
17. 17.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
18. 18.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM
19. 19.🧩 A box has 6 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 11 (b) not enough info (c) 35 (d) 30
20. 20.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
21. 21.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
22. 22.🧩 Ananya is 7 years old. Ishaan is 8 years older than Ananya. How old is Ishaan? (a) not enough info (b) 8 (c) 16 (d) 15
23. 23.🧩 Tara is 9 years old. Diya is 2 years older than Tara. How old is Diya? (a) 11 (b) 2 (c) 12 (d) not enough info
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
25. 25.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
26. 26.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 6 PM (c) 9 PM (d) not enough info
27. 27.🧩 Vihaan is 8 years old. Rohan is 2 years older than Vihaan. How old is Rohan? (a) 2 (b) 11 (c) 10 (d) not enough info
28. 28.🧩 Rohan is 9 years old. Saanvi is older than Rohan. How old is Saanvi? (a) 11 (b) not enough info (c) 10 (d) 14
29. 29.🧩 Saanvi is 12 years old. Diya is 8 years older than Saanvi. How old is Diya? (a) not enough info (b) 21 (c) 20 (d) 8
30. 30.🧩 Meera is 6 years old. Rohan is older than Meera. How old is Rohan? (a) 8 (b) 7 (c) 11 (d) not enough info
31. 31.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
32. 32.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
33. 33.🧩 Vihaan bought 6 kites and a bag for ₹190 in all. Each kite cost the same. What did one kite cost? (a) ₹184 (b) not enough info (c) ₹31 (d) ₹190
34. 34.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
35. 35.🧩 A box has 7 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) not enough info (b) 64 (c) 56 (d) 15
36. 36.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) dogs hate you (d) all dogs are mean
37. 37.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) not enough info (b) 14 (c) 7 (d) 70
38. 38.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
39. 39.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) facts that support it (d) a guess
40. 40.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False

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