Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 407 · 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.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
2. 2.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
3. 3.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
5. 5.🧩 Meera is 6 years old. Tara is older than Meera. How old is Tara? (a) 11 (b) not enough info (c) 8 (d) 7
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
8. 8.🧩 Rohan is 6 years old. Diya is 9 years older than Rohan. How old is Diya? (a) 16 (b) 9 (c) not enough info (d) 15
9. 9.🧩 Saanvi is 12 years old. Diya is older than Saanvi. How old is Diya? (a) 13 (b) not enough info (c) 17 (d) 14
10. 10.🧩 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
11. 11.🧩 A box has 8 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 40 (c) 45 (d) 13
12. 12.🧩 Ishaan is 7 years old. Saanvi is older than Ishaan. How old is Saanvi? (a) 12 (b) 9 (c) 8 (d) not enough info
13. 13.🧩 Vihaan bought 6 markers for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹240 (b) not enough info (c) ₹45 (d) ₹40
14. 14.🧩 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
15. 15.🧩 Nisha bought 6 notebooks and a bag for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹134 (b) not enough info (c) ₹140 (d) ₹23
16. 16.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
17. 17.🧩 Vihaan is 10 years old. Ananya is older than Vihaan. How old is Ananya? (a) 15 (b) not enough info (c) 11 (d) 12
18. 18.🧩 Vihaan is 9 years old. Aarav is 3 years older than Vihaan. How old is Aarav? (a) 12 (b) 3 (c) not enough info (d) 13
19. 19.🧩 Aarav is 8 years old. Diya is older than Aarav. How old is Diya? (a) not enough info (b) 9 (c) 13 (d) 10
20. 20.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
21. 21.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) not enough info (c) 7 (d) 14
22. 22.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
23. 23.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Rohan bought 2 balls and a water bottle for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹98 (b) ₹100 (c) ₹50 (d) not enough info
25. 25.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
26. 26.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
27. 27.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
28. 28.🧩 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
29. 29.🧩 Diya bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹15 (c) ₹30 (d) not enough info
30. 30.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
31. 31.🧩 A box has 7 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 56 (b) 14 (c) not enough info (d) 49
32. 32.🧩 Saanvi bought 5 balls for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹200 (b) ₹40 (c) ₹45 (d) not enough info
33. 33.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
34. 34.🧩 A box has 7 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 72 (b) 63 (c) not enough info (d) 16
35. 35.🧩 A box has 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 13 (b) not enough info (c) 40 (d) 45
36. 36.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
37. 37.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
38. 38.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
39. 39.🧩 Aarav bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹65 (c) ₹60 (d) ₹180
40. 40.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True

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