Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 679 · 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.🧩 Nisha bought 3 mangoes for ₹135 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹135 (c) ₹45 (d) ₹50
2. 2.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
3. 3.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
4. 4.🧩 A box has 8 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 15 (b) not enough info (c) 56 (d) 63
5. 5.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
6. 6.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) never see dogs (d) all dogs are mean
10. 10.🧩 Rohan is 12 years old. Saanvi is 4 years older than Rohan. How old is Saanvi? (a) not enough info (b) 16 (c) 17 (d) 4
11. 11.🧩 Vihaan is 11 years old. Diya is 9 years older than Vihaan. How old is Diya? (a) 21 (b) 9 (c) not enough info (d) 20
12. 12.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
13. 13.🧩 Rohan bought 5 balls for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) not enough info (c) ₹40 (d) ₹200
14. 14.🧩 Meera bought 3 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹75 (b) not enough info (c) ₹25 (d) ₹30
15. 15.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
16. 16.🧩 Aarav bought 4 kites and a bag for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹250 (b) not enough info (c) ₹246 (d) ₹62
17. 17.🧩 A box has 3 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 16 (b) 12 (c) 7 (d) not enough info
18. 18.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
19. 19.🧩 A box has 4 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 9 (c) 20 (d) 25
20. 20.🧩 A box has 7 rows of apples, with 6 in each row. How many apples are in the box? (a) 13 (b) 48 (c) not enough info (d) 42
21. 21.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
22. 22.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Aarav bought 5 pens and a cap for ₹335 in all. Each pen cost the same. What did one pen cost? (a) ₹330 (b) not enough info (c) ₹67 (d) ₹335
24. 24.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) not enough info (b) 5 (c) 50 (d) 10
25. 25.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
26. 26.🧩 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
27. 27.🧩 Ishaan is 6 years old. Diya is 5 years older than Ishaan. How old is Diya? (a) not enough info (b) 11 (c) 12 (d) 5
28. 28.🧩 Ananya is 11 years old. Arjun is older than Ananya. How old is Arjun? (a) 16 (b) 12 (c) 13 (d) not enough info
29. 29.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
30. 30.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
31. 31.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 7 PM (c) not enough info (d) 8 PM
32. 32.🧩 Vihaan bought 2 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹20 (c) ₹25 (d) not enough info
33. 33.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
34. 34.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
35. 35.🧩 Nisha bought 6 pens and a bag for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹140 (b) ₹23 (c) not enough info (d) ₹134
36. 36.🧩 Kabir bought 4 mangoes for ₹180 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) ₹50 (c) not enough info (d) ₹180
37. 37.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
38. 38.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
39. 39.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
40. 40.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False

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