Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 518 · 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.🧩 A box has 7 rows of apples, with 9 in each row. How many apples are in the box? (a) 16 (b) 72 (c) not enough info (d) 63
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
3. 3.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
4. 4.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
5. 5.🧩 A box has 5 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) not enough info (b) 25 (c) 30 (d) 10
6. 6.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
7. 7.🧩 Kabir is 9 years old. Saanvi is 3 years older than Kabir. How old is Saanvi? (a) not enough info (b) 13 (c) 12 (d) 3
8. 8.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
10. 10.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
11. 11.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Ishaan is 12 years old. Nisha is older than Ishaan. How old is Nisha? (a) 13 (b) 14 (c) 17 (d) not enough info
14. 14.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
15. 15.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
16. 16.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) the page number (d) what facts are given
17. 17.🧩 Saanvi bought 4 pens for ₹240 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹240 (c) ₹65 (d) not enough info
18. 18.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
19. 19.🧩 Diya bought 5 kites and a bag for ₹190 in all. Each kite cost the same. What did one kite cost? (a) ₹38 (b) ₹190 (c) ₹185 (d) not enough info
20. 20.🧩 Tara is 10 years old. Meera is 2 years older than Tara. How old is Meera? (a) 12 (b) not enough info (c) 2 (d) 13
21. 21.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
22. 22.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
23. 23.🧩 Diya bought 2 kites and a lunch box for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹110 (b) ₹55 (c) ₹108 (d) not enough info
24. 24.🐕 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
25. 25.🧩 Nisha bought 6 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹10 (c) ₹15 (d) ₹60
26. 26.🧩 Diya is 6 years old. Tara is 9 years older than Diya. How old is Tara? (a) 15 (b) 9 (c) 16 (d) not enough info
27. 27.🧩 Diya bought 6 markers for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) not enough info (c) ₹300 (d) ₹50
28. 28.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 12 (b) 6 (c) 60 (d) not enough info
29. 29.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
30. 30.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 8 (b) 80 (c) not enough info (d) 16
31. 31.🧩 A box has 6 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 11 (b) 35 (c) 30 (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) no, check more (b) yes, it is certain (c) no mango is sweet (d) yes, mangoes match
33. 33.🧩 Ishaan is 6 years old. Arjun is older than Ishaan. How old is Arjun? (a) not enough info (b) 7 (c) 8 (d) 11
34. 34.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 90 (c) not enough info (d) 18
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
36. 36.🧩 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
37. 37.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
38. 38.🧩 A box has 7 rows of guavas, with 5 in each row. How many guavas are in the box? (a) not enough info (b) 40 (c) 35 (d) 12
39. 39.🧩 Ananya bought 3 pens for ₹45 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) not enough info (c) ₹45 (d) ₹20
40. 40.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True

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