Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 118 · 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.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
2. 2.🧩 A box has 7 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 49 (b) 56 (c) not enough info (d) 14
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
4. 4.🧩 Rohan is 8 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 9 (b) 10 (c) not enough info (d) 13
5. 5.🧩 A box has 4 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 8 (c) 16 (d) 20
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
7. 7.🧩 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
8. 8.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) not enough info (b) 40 (c) 4 (d) 8
9. 9.🧩 Arjun is 9 years old. Nisha is older than Arjun. How old is Nisha? (a) 14 (b) not enough info (c) 10 (d) 11
10. 10.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
11. 11.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
13. 13.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
14. 14.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Meera bought 2 notebooks and a cap for ₹190 in all. Each notebook cost the same. What did one notebook cost? (a) ₹190 (b) ₹188 (c) ₹95 (d) not enough info
17. 17.🧩 A box has 5 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 36 (b) 30 (c) 11 (d) not enough info
18. 18.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
19. 19.🧩 A box has 8 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 48 (b) 14 (c) 54 (d) not enough info
20. 20.🧩 Arjun bought 3 pens for ₹165 in all. Each pen cost the same. What did one pen cost? (a) ₹165 (b) ₹55 (c) ₹60 (d) not enough info
21. 21.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
22. 22.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 7 PM
23. 23.🧩 Vihaan bought 3 balls for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹135 (b) ₹50 (c) not enough info (d) ₹45
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.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 6 (b) 60 (c) not enough info (d) 12
26. 26.🧩 Aarav bought 3 kites for ₹105 in all. Each kite cost the same. What did one kite cost? (a) ₹105 (b) ₹40 (c) not enough info (d) ₹35
27. 27.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
28. 28.🧩 A box has 3 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 27 (b) not enough info (c) 12 (d) 36
29. 29.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 9 PM (c) not enough info (d) 6 PM
30. 30.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) guessing (d) asking one friend
31. 31.🧩 Vihaan is 12 years old. Ishaan is older than Vihaan. How old is Ishaan? (a) 14 (b) 17 (c) 13 (d) not enough info
32. 32.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no, check more (d) no mango is sweet
33. 33.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
34. 34.🧩 Vihaan is 9 years old. Nisha is 9 years older than Vihaan. How old is Nisha? (a) not enough info (b) 18 (c) 19 (d) 9
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
36. 36.🧩 A box has 3 rows of guavas, with 9 in each row. How many guavas are in the box? (a) not enough info (b) 36 (c) 27 (d) 12
37. 37.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
38. 38.🧩 Rohan is 10 years old. Aarav is older than Rohan. How old is Aarav? (a) 15 (b) 12 (c) not enough info (d) 11
39. 39.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
40. 40.🧩 Diya is 6 years old. Rohan is 5 years older than Diya. How old is Rohan? (a) 11 (b) not enough info (c) 5 (d) 12

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